dmaengine: core: Revert back to pr_debug in __dma_request_channel()
Commit ef859312c3a1 ("dmaengine: core: Use dev_ functions for debug and
error prints") wasn't quite right in __dma_request_channel() by claiming
that all pr_ prints have valid DMA channel pointer. Obviously it is not
true as __dma_request_channel() is looking for a channel and returns NULL
if it does not find it.
Prevent this potential NULL pointer dereference by reverting back to
pr_debug().
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index a7131d4..ca1400d 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -664,7 +664,7 @@
}
mutex_unlock(&dma_list_mutex);
- dev_dbg(chan->device->dev, "%s: %s (%s)\n",
+ pr_debug("%s: %s (%s)\n",
__func__,
chan ? "success" : "fail",
chan ? dma_chan_name(chan) : NULL);